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J. P. DOVEL. TWYER AND COOLING BOX- APPLICATION FILED OCT. 30. 1917.

Patented Sept. 28, 1920.

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JAMES P. DOVEL, OF BIRMINGHAM, ALABAMA.

, TWYER AND COOLING-BOX.

T 0 all whom it may concern Be it known that I, JAMES P. Down, a

citizen of the United States of America, residing at Birmingham, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements :in Twyers and Cooling-Boxes, of which the following is a specification.

This invention relates to twyers, cooling boxes and like devices which are water cooled and in which the cooling water is delivered by means of a discharge pipe leading through the water chamber in the twyer or cooler to the'inner end thereof where it delivers the cold water against the parts sub-. jected to the most intense heat. The practice heretofore has been to cast the water discharge pipe in the 'twyer or cooling box and in doing so it was necessary to dispose the pipe in such manner as to in- I sure it being spaced from the water cham- The contained discharge pipe must there-.

her walls of the twyer or coolingbox which are made tapering toward thelr inner ends.

fore be disposed at an acute angle to the plane of the outer end wall of the twyer or cooling box. Threaded openings were tapped in such outer endwall to receive the water supply pipe which delivers water through the contained discharge pipe into the water chamber in the manner already described. The difiiculties experienced with such practice are; first, it is expensive and somewhat difficult to cast-joint the bronze water discharge pipe in the twyer or cooling'box; second, there is no way to determine that the pipe in the finished casting sets inproper position in the water chamher, the danger resulting from this being that if the pipe touches the water chamber I walls it is liable to cause mud to accumulate about the point of contact, thus diminishing the cooling action of the water and causing the twyer or cooling box to burn out at this point; third, when screwing the water supply pipes into the twyer or cooling box have frequently found that the cast-j ointed pipe is forced into the water chamber and when this occurs the mud rapidly accumulates at the inner end of the water chamber and the twyer or cooling box burns out; fourth, the. threads tapped in the twyer or cooling box for the water supply pipes be- Patented Sept. 28, 1920. Serial No. 199,345.

come rapidly worn and often result in the discarding of the twyer when otherwise serv ceable; and fifth, when the twyer or cooling box is damaged or burnt out for any reason the contained bronze water pipe is scrapped with it.

If it be attempted to screw the contained water pipe into a threaded opening provided in the outer end wall of the twyer or cooling box it would be necessary to tap such opening at an angle to the plane of said wall, for angles to the axis of the twyer or cooling box bore whereas the pipe must be inclined relatively to said wall to avoid contact with the inclined walls of the water chamber. To bore at such an angle is a troublesome and expensive operation and if carelessly performed would result in the improper arrangement of the contained pipe in the water chamber with the results above pointed out. The object of'my invention is to devise a simple, practical and inexpensive way to detachably mount the contained water dis charge pipe in the twyer or cooling box and at the same time to overcome the objections above pointed out in the present practice. To this end I have designeda fitting adapted to be screwed into a threaded opening tapped at right angles through the outer end wall of the twyer or cooling box. The fitting at its outer end is internally threaded to receive the water supply pipe and at its inner end is externally threaded to screw into the twyer or cooling box, and it is provided with an internal shoulder beyond which its bore is enlarged toward its inner end. The water discharge pipe is adapted to be inserted through the outer end of the fitting and is provided with a bead or flange adapted to seat against the shoulder in the fitting. The pipe will fit loosely in the fiaring bore at the inner end of the fitting so that it will accommodate itself to the taper of the twyer or cooling box and will also such wall is disposed at right out departure from the. principles'involved. It will bebetter understood byreference tothe accompanying drawings which illustrate only the preferred embodiments thereof, and in which I Figure 1 illustrates in vertical section the twyer and cooling box equipped with my inl vention.

' Fig. 2 is an enlarged view in longitudinal section through the fitting showing the water discharge and supply pipes in side elevation broken away.

Similar reference numerals refer to similar' parts throughout the drawings.

As illustrated, the furnace wall 1 has provided therein an inwardly tapered opening 2 in which is fitted the cooling box 3 in the manner well understood in this art; In like manner, at the inner end of the cooling box is mounted the twyer 4 in the customary manner and both twyer and cooling box r mp may be of any standard type.

In applying my invention to twyer-s, I in the outer end wall of the twyer at right angles thereto a threaded opening 5 1 whichis adapted to receive the inner ex- "ternally threaded end 6 of the fitting 7 the outer end of which is internally threaded at 8 to receive the water supply pipe 9. In the fitting bore I provide an internal annular shoulder 10. this shoulder, leaving an unthreaded section 11 of the bore which serves to stop the inner end of the supply pipe the desired dis- .with its outer end bind tance from the shoulder 10. The customary type of bronze water discharge pipe 12 is adaptedto be inserted through the fitting flange or lip 13 engaging the shoulder 10 in the fitting. he dis? charge pipe 12 is held by its lip free to rock in the taper bore at the inner end of the fitting so that it will accommodate itself to the inclined or tapering walls of the water chamber 14 in thetwyer. This manner of mounting the discharge pipe 12 inthe fitting bore is clearly illustrated in Fig. 2, which i also shows that the water supply pipe cannot be screwed in far enough to on the outer end of the pipe 12. I From this arrangement it will be seen that, the discharge pipe being left free in the fitting, a limited amount of water will leak past the joint between it and the shoulder '10, but.

this willnot be disadvantageous as thewater will leak into the water chamber and flowing along the pipe will have a tendency to pre- 'vent mud accumulating along thepipe. The

discharge of water through the loose discharge pipe 12 will which will also prevent anyaccumulation of mud between it and the twyer so that there will be no practical danger of a burn out from that, cause. The cooling water thus discharged at the inner end of the twyer is conducted off through an outlet pipe 15' The threads 8 stop short ofcause a vibration thereof threaded into the outer end wall of the twyer.

T he construction and arrangement is substantially the same for the cooling box 3 which has a Water chamber 16 therein and a threaded hole 17 tapped in its outer end wall to receive the fitting 7 in the manner already described. The water discharge pipe 18 is similar to 12, except that it is made longer, and it is mounted in the same manner in the fitting 7. Water is supplied to the cooling box by an inlet pipe 19 and is conducted therefrom by an outlet pipe 20. The blast pipe 21 projects through the cooling' box and fits in-the twyer borein the manner well understood in this art.

In operation, the inflowing water delivered by the pipes 9 or :19 to the contained discharge pipes 12 or 18, respectively, will be discharged thereby at the inner or hottest end of the twyer or cooling box and the pipes 12 or 18, being left free to vibrate, no accumulation of mud will occur where they may happen to rest on the outer wall of the water chamberslt or 16. It will be obvious that the screwing and unscrewing of the water supply pipes will wear only on the threads of the fitting 7 and when these become worn a new fitting can be substituted at negligible cost, thus protecting the twyer or cooling box from ,Wear' in its threadedholes. \Vhen thetwyer or cooling used inthe twyer orcoolingbox which replaces the one discarded. It will also be apparent that this type of cooling box or twyer can be produced at less expense than where the contained water discharge pipe is cast jointed therein, and moreover itwill always bepossible for the operator to ascertain by examination that the contained water discharge pipes 12 hr 18 are in proper operating position.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination with a twyer and the like having a water chamber and a threaded water inlet port in its outer wall, of a fitting having its inner end externally threaded, an internal shoulder beyond which the water inlet port in its outer wall, of a fitting hayingits inner end externally threaded, an lnternal shoulder beyond which the bore of the fitting is enlarged toward its inner end, internal threads in the outer end of the fitting bore, and a discharge pipe inserted through the bore of the fitting and having its outer end flanged to engage said shoulder, said internal threads stopping short of said shoulder to leave the flanged end of the pipe room for angular play between the shoulder and the internal threads, substantially as described.

In testimony whereof I aifix my signature. JAMES P. DOVEL. Witness:

NoMm WELSH. 

